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Physical & Chemical properties

Surface tension

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Reference
Endpoint:
surface tension
Type of information:
experimental study
Adequacy of study:
key study
Study period:
15 June 2012
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
other: The study was well conducted according to DIN 53914 and ISO 304: 1985.
Qualifier:
according to
Guideline:
other: DIN 53914 Determining the surface tension of surfactants
Deviations:
no
Qualifier:
according to
Guideline:
other: ISO Standard 304-1985
Deviations:
no
GLP compliance:
no
Type of method:
ring method
Key result
Surface tension:
33 mN/m
Temp.:
25 °C
Conc.:
1 g/L
Remarks on result:
other: The critical micelle concentration (CMC) was found to be 0.14 g/L at pH 7.0 and 25°C.
Conclusions:
The surface tension of 1 g/L solution of the test substance was found to be 33 mN/m at 25°C and the critical micelle concentration was found to be 0.14 g/L at pH 7.0.
Executive summary:

The surface tension of the test substance was determined according to DIN 53914 and ISO 340:1985 (ring method). Critical micelle concentration was determined using an automated tensiometer (KSV Tensiometer Sigma 70) connected with a computer. The water used was distilled and deionised using a MilliQ® plus purifier from Millipore. The tensiometer was calibrated with distilled water (surface tension value (mAV) at 25°C = > 72 mN/m). Under the conditions of the study, the surface tension of the1 g/L solution of the test substance at 25°C was found to be 33 mN/m and the critical micelle concentration was found to be 0.14 g/L at pH 7.0.

Description of key information

The surface tension was determined according to DIN 53914 and ISO 340:1985 (ring method) (Börjesson J, 2012).

Key value for chemical safety assessment

Surface tension:
33
in mN/m at 20°C and concentration in mg/L:
1 000

Additional information